CD 639.3: Russia
8 1/2" X 5 5/8" (216mm X 143mm)
(inside groove between inner/outer skirt) ШС 20 E Д 7 20 ШС-10-12 . S-CC-1V (crown) C1
Picture courtesy Nathan Holmes |
This is a modern glass power insulator from Russia or Ukraine.
CD assignment by Dario Dimare November 2021.